|Fontenot, Emily -|
Submitted to: Journal of Stored Products Research
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: August 6, 2013
Publication Date: December 2, 2013
Citation: Arthur, F.H., Fontenot, E.A. 2013. Efficacy of dinotefuran (Alpine® spray and dust) on six species of stored product insects. Journal of Stored Products Research. 55:55-61. DOI: http://dx.doi.org/10.1016/j.jspr.2013.08.001. Interpretive Summary: Alpine® is a new insecticide that is being used to control urban insect pests, and is available as a pressurized spray or as a dust combined with diatomaceous earth (DE). There is no information regarding effectiveness on stored product insects. ARS scientists in Manhattan, KS, conducted tests with both products to determine effectiveness on different stored product insects. The dust formulation was much more effective than the spray on all adult insects tested, but larvae were easily killed by both products. Results show this new insecticide can potentially replace older insecticides used to control stored product insects in milling and processing facilities.
Technical Abstract: Dinotefuran, an agonist of insect nicotinic acetylcholine receptors, was evaluated both as a 0.5% active ingredient aerosol spray and a dust combined with diatomaceous earth (DE), 5 g/m2 and 10g/m2), at 45% r.h. and 75% r.h. Target species were six adult stored product insect species: Tribolium castaneum (Herbst) , Rhyzopertha dominica (Fauvel), Oryzaphilus surinamensis, (L.), Tribolium confusum Jacqueline duVal, Dermestes maculatus (DeGeer), and Mezium affine (Boieldieu). Adults were continually exposed for 4 d on the dusts, and assessments were done after 8 h and after 1, 2, 3, and 4 d to determine knockdown and adult survival/mortality. Mortality of T. castaneum, R. dominica, and O. surinamensis generally increased with exposure interval, and was 90% or more after three days of exposure at both dust rates and r.h. levels. Mortality of D. maculatus and T. confusum after three days ranged between 60 and 70% and 50 and 60%, respectively. Mortality of M. affine was 5% or less even after 4 days of exposure. Mortality of all species except M. affine was generally lower when exposed to the spray rather than the dust. No late stage larvae of T. castanum, T. confusum, O. surinamensis, exposed to either the spray or the dusts emerged as adults, and only 3% of exposed D. maculatus emerged as adults. Results show that dinotefuran could be incorporated into management plans for control of stored product insects.